The Higgs boson makes absolutely no sense to me because despite the Higgs field's presence everywhere, its existence is very hard to confirm. Then why does we we posit that it exists? If it has so few ...

I want to get something clear that I do not seem to understand. I used to read that the photon A and the Z boson are (different) linear combinations between the W^0 (neutral weak boson before SU(2) ...

Consider the Georgi-Glashow model, an $SU(2)$ gauge theory with a real scalar in the adjoint (thus a 3-vector in the colour space) $\phi$. The Lagrangian is
$$ L = -\frac{1}{4g^2} F_{\mu \nu}^{\, a} ...

My objective is to calculate the masses of the fermions using Higgs mechanism of the Standard Model.
I know Quantum Mechanics and a few basics to Field Theory (like what Noether Theorem is.) with an ...

I wish to understand more about the relationship between superconductivity and spontaneous symmetry breaking. I would also appreciate sources for learning about symmetry breaking and particles in more ...

I noticed some article on massless Weyl fermions and it got me thinking. I'm wondering if there is any explanation for why bosons (specifically gauge bosons) can be massless (photon and gluon) but we ...

According to my understanding, the dark energy is something that permeates spaces. The space in between the quantum particles(say like space between a nucleus and electrons, going even more deeper,i ...

It is known that the Higgs boson gives mass to elementary particles. Also known that if manipulate with the Higgs field and decrease mass of particles then atoms starts to decay and the object will be ...

What is meant by standard model vacuum? Is it same as the the vacuum of the Higgs potential? What is meant by the stability or instability of vacuum? And how is Higgs self-interaction responsible for ...

In talking about Higgs mechanism, the first part is always some introduction to the concept of spontaneously symmetry breaking (SSB), some people saying that Higgs mechanism is the results of SSB of ...

As the vector boson field $W_\mu$ is, together with $Z^0$, the gauge field for the Standard electroweak model, I know it transforms as a connection under the $SU(2)\times U(1)_Y$ group. But, when this ...

From what I can tell, it seems that particles have two kinds of mass, the mass inherent in a fundamental particle itself, or for composite particles, additional mass associated with the Higgs field. ...

If string theory happened to be correct, and a point-particle is replaced with a string, there is a direct correlation between the vibrating frequency of the string and the particle it produces. I was ...

Because of the Higgs mechanism, one must replace the Higgs field $\phi$ with $\phi_0 + \phi_1$ where $\phi_0$ is the vacuum expectation value. As far as I understand, the $\phi_0$ gives the mass term ...

Context: In a excercise, consider a SU(2) gauge theory. The Lagrangian of the theory contains the three gauge fields and some scalar matter fields:
$\phi_1 , \phi_2$ form a SU(2) doublet (fundamental ...

Usually the Higgs potential is given as $$ \frac{1}{2}\mu^2\phi^2 - \frac{1}{4}\lambda^2\phi^4 $$ but I never quite understood if this just serves to give us an idea of how symmetry breaking works, or ...

On Page 138, Quantum Field Theory of Many-body Systems: From the Origin of Sound to an Origin of Light and Electrons by Xiaogang Wen, when he demonstrates the Anderson-Higgs mechanism for the $U(1)$ ...

In the lepton Lagrangian there are no mass terms allowed for the gauge bosons, due to gauge symmetry. To fix the problem of existing gauge boson masses, we introduce another field (Higgs) and say that ...

Do any, all, or no adjustments to standard model change the Weinberg angle or it’s relation to masses or coupling constants?
If any, which (types of) ones?
For the ones that do, what are the relations ...

Why does the Higgs field have less energy when it's non-zero than when it's zero? There are references to this question on the site, but they are too heavy going for me for a while yet. Anybody want ...

In the Standard Model scalar potential, we only consider quadratic and quartic terms, why not cubic terms though? I've noticed also in BSM theories with one extra scalar singlet, only quadratic and ...